Question

F

この問題の最後でマイナスは（a−c）だけかけたのでしょうか?それっていいんですか?

Con
2
ach²-(²) +h((² a²) + ((a²-lin)
cảnh
= al ²-ac² +hc²-a²h+ a²c-b²c
=a²(-h₁+ c) +a (h²_(²) + (h(z uzc
= = (h-ca² + (h+() (h~() α-hc (h-c
= -(4-0)(a ² - (h+C) a +hc}
20
= = (h-() (α-42 (9-()
"17
= (α-W) ( h-(P((-a)
t